CN1794864A - Different frequency/different system mensuring method in multimedia broadcasting group broadcast service - Google Patents

Abstract

The invention discloses an inter-frequency/different-system measurement method in a multimedia broadcast multicast service, which includes setting the inter-frequency/different-system measurement time of a user terminal according to the time of sending MCCH information by UTRAN to avoid total overlap with the sending time of MCCH information ; or UTRAN according to the time setting of the MCCH information issued by itself to avoid the inter-frequency/different system measurement time that overlaps with the MCCH information delivery time, and assign the inter-frequency/different system measurement time to the user terminal; the user terminal is in its own Perform different frequency/different system measurement processing at the set different frequency/different system measurement time or at the different frequency/different system measurement time specified by UTRAN. The present invention can avoid the overlap of the total measurement time of different frequencies/different systems and the time of sending MCCH information by UTRAN, resulting in the drawback that the user terminal cannot receive MCCH information during the measurement period of different frequencies/different systems.

Description

Inter-frequency/inter-system measurement method in multimedia broadcast multicast service

technical field

The present invention relates to the terminal inter-frequency measurement processing technology in the third generation mobile communication system (3G, The 3rd Generation), in particular to a multi-frequency/different system measurement in a multimedia broadcast multicast service (MBMS, MultimediaBroadcast/Multicast Service) method.

Background technique

Universal Mobile Telecommunications System (UMTS, Universal Mobile Telecommunications System) is a third-generation mobile communication system using WCDMA air interface technology, mainly developed in the WCDMA/GSM global standardization organization 3GPP.

Among them, in the 3GPP UMTS standard, according to whether the radio resource control (RRC, Radio Resource Control) connection is established, the user terminal can be divided into two types: the idle (Idle) mode and the RRC connection (Connected) mode: among them, the user terminal is not connected to the UMTS Universal Terrestrial Radio Access The user terminal that establishes an RRC connection in the network (UTRAN, Universal Terrestrial Radio Access Network) is in the Idle mode, and the user terminal in this mode can only be distinguished by the non-access stratum (NAS, Non-Access Stratum) identifier, such as through the international mobile The station identification number (IMSI, International Mobile subscriber identity) to distinguish; wherein the user terminal that has established an RRC connection with UTRAN is in the RRCConnected mode, and the user terminal in this mode is assigned a wireless network temporary identity (RNTI, Radionetwork temporary identity) as The identification of the user terminal on the common transmission channel.

For the user terminal in RRC Connected mode, the user terminal can be divided into different states according to the level of RRC connection and the type of transmission channel that the user terminal can use: among them, the user terminal in the CELL_PCH state, CELL_FACH state and CELL_DCH state is at the cell level It can be distinguished, and user terminals in the URA_PCH state can be distinguished at the UTRAN Register Area (URA, UTRAN RegisterArea) level. Among them, the user terminal in the CELL_DCH state is assigned a dedicated physical channel, and the user terminal can use a dedicated transport channel and a shared channel and their combination; the user terminal in the CELL_FACH state must continuously monitor a common transport channel (FACH, Forward Access) in the downlink Channel), the default public channel (RACH, ReverseAccess Channel) is allocated in the uplink; the user terminal in the CELL_PCH and URA_PCH state adopts the discontinuous reception (DRX, Discontinuous Reception) mode through the relevant paging indicator channel (PICH, PageIndicator Channel ) monitors a paging channel (PCH, Page Channel), and the user terminals in these two states do not have any uplink activity.

In the 3GPP UMTS standard, when the user terminal is in different modes and states, it needs to measure inter-frequency cells according to the received system information and the receiving quality of the cell it is in, so as to perform cell reselection, handover and other processing. Among them, the trigger conditions for the inter-frequency measurement of the user terminal in the idle, CELL_PCH, URA_PCH and CELL_FACH states are the received system information and the reception quality of the current cell; and the trigger conditions for the inter-frequency measurement of the user terminal in the CELL_DCH state are Measurement control information issued by the system. Generally, for a user terminal without dual receivers, since it cannot support receiving and decoding signals on two different frequencies at the same time, the user terminal will interrupt receiving signals in the current cell during inter-frequency measurement.

At the same time, with the development of third-generation mobile communication technology, users' demand for mobile communication services is no longer satisfied with voice services, because the third-generation mobile communication system can provide a higher data transmission rate than the second-generation mobile communication system , so a large number of multimedia services have emerged, such as: video calls, picture downloads, high-speed Internet browsing and other services. Among them, some application services require multiple users to receive the same data at the same time, such as: video on demand, TV broadcasting, video conferencing, online education, interactive games and other services.

In order to effectively utilize the resources of the mobile communication network, the third generation mobile communication system introduces the concept of multicast and broadcast. The multicast and broadcast service is a technology to transmit the same data from one data source to multiple targets. Thus, the WCDMA/GSM global standardization organization 3GPP proposed Multimedia Broadcast/Multicast Service (MBMS, Multimedia Broadcast/Multicast Service). The so-called MBMS is to provide a data source in a mobile communication network to send the same data to multiple users. Multi-point services to realize network resource sharing and improve the utilization rate of network resources, especially the utilization rate of air interface resources.

The data transmission mode of MBMS service between user terminal (UE, User Equipment) and UTRAN can be divided into two kinds: point-to-point (PTP, Point to Point) mode and point-to-multipoint (PTM, Point to Multipoint) mode. Among them, the PTP mode is used in the multicast mode of MBMS, and the user terminal in the RRC connection mode in the multicast mode receives control information through a dedicated control channel (DCCH, Dedicated ControlChannel) and receives data through a dedicated traffic channel (DTCH, Dedicated TrafficChannel). information. The PTM mode is used in the broadcast or multicast mode of MBMS. In this mode, the user terminal receives data information through the MBMS point-to-multipoint traffic channel (MTCH, MBMS point-to-multipoint Traffic Channel), and controls the data through the MBMS point-to-multipoint traffic channel. The channel (MCCH, MBMS point-to-multipoint Control Channel) receives control information.

The control information of the MBMS service in PTM mode is delivered through the MCCH. The MBMS control information delivered on the MCCH includes service information, access information, and radio bearer information. For simplicity, the following MBMS information sent on the MCCH The control information is simply referred to as "MCCH information". MCCH information is divided into critical information and non-critical information: critical information includes MBMS neighbor cell information, MBMS service information and MBMS radio bearer information; non-critical information is MBMS access information.

MCCH information is sent based on fixed scheduling, and complete MCCH information is sent periodically based on a "repetition period" to improve reception reliability. The "modification period" is an integer multiple of the "repeat period", critical information can only be modified when the MCCH information is sent for the first time within the modification period; UTRAN will send MBMS modification information at the beginning of each modification period, and this modification information contains The ID of the MBMS service whose MCCH information is modified in this modification period; the MBMS modification information is repeated at least once in each repetition period in this modification period; non-critical information can be modified at any time. In addition, MBMS access information is sent periodically based on an "Access Information Period", and a "Repeat Period" is an integer multiple of the "Access Information Period". Specifically, FIG. 1 is a schematic diagram of the relationship among the "repetition period", "modification period" and "access information period" during UTRAN sending MCCH information.

Among them, the values of modification cycle, access information cycle, and repetition cycle are as follows:

Modification period—modification period coefficient m range: (7...10), modification period MP=2 ^m × frame length.

Access information period—access information period coefficient a range: (0...3), access information period AIP=(MP/2 ^a )×frame length.

Repeat period—repeat period coefficient r range: (0...3), repeat period RP=(MP/2 ^r )×frame length.

In the cell, the user terminal obtains information about MBMS services by receiving MCCH information, and obtains access information of interested services by receiving access information in MCCH information, and sends MBMS service request information to UTRAN based on the access information.

Wherein, in the CELL_FACH state, the user terminal locates a frame (SFN, system frame number) that satisfies the following formula, and performs inter-frequency measurement on the frame that satisfies the formula:

SFN div N＝C_RNTI mod M_REP+n×M_REP (Formula 1)

Among them:

N represents the TTI of the FACH with the maximum transmission time interval (TTI, Transmission Timing Interval) on the Secondary Common Control Physical Channel (SCCPCH, Secondary Common Control Physical Channel) monitored by the user terminal, which carries the non-MBMS logical channel, divided by 10ms;

M_REP represents the measurement interval cycle period, M_REP= ^2k ; from the above formula, the repetition period of the measurement time of an N frame is N×M_REP frame;

Where k is the FACH measurement interval cycle coefficient, which is read in the information element "FACH measurement occasion info" contained in system information 11 or 12;

C_RNTI (cell radio network temporary identity) is the C-RNTI value of the UE;

n=0, 1, 2... as long as SFN is below its maximum value.

The corresponding values of N and k are: _TTTI k 1 3, 4, 5, 6 2 2, 3, 4, 5

In this way, the user terminal calculates the SFN that satisfies the conditions according to the above formula (1), performs inter-frequency measurement on the SFN that satisfies the conditions, and interrupts the MBMS reception of the current cell during the inter-frequency measurement.

Since the "access information period" of MCCH information issued by UTRAN is at least 0.16s, the values within the value range are all multiples of this minimum value; at the same time, when the FACH TTI=10ms and k=3 of the user terminal in the CELL_FACH state , then according to the above formula (1), the inter-frequency measurement time is calculated every 80 ms, and the measurement duration is 10 ms. The existence of this reason may lead to the following problems:

(1) The inter-frequency measurement time of some user terminals always overlaps with the time when UTRAN sends MCCH information. Since the user terminal needs to perform inter-frequency measurement within this overlapping time, the user terminal always Important MCCH information cannot be received.

(2) In order to avoid the problem in (1), UTRAN can change the C-RNTI of the user terminal to avoid the overlapping of the user terminal inter-frequency measurement time and MCCH information delivery time, but when there are many user terminals performing inter-frequency measurement , considering the difference in the delivery time of MCCH information in each cell, UTRAN needs to change the C-RNTI of each user terminal separately to avoid the overlapping of the time of inter-frequency measurement of each user terminal and the delivery time of MCCH information. Therefore, the complexity of allocation and scheduling of UTRAN may be increased.

Wherein, when the user terminal supports the Discontinuous Reception (DRX) function in the Idle, CELL_PCH and URA_PCH states, the inter-frequency measurement should be performed at least every (Ncarrier-1)×TmeasureFDD time. The parameter Ncarrier refers to the number of measured different frequencies; the terminal should use at least two measured values of different frequencies to obtain measured values of different frequencies on average, and the interval between at least two measured values used for the averaged measured values of different frequencies is at least TmeasureFDD/2. The relevant parameters are as follows: DRX cycle length[s] 0.08 0.16 0.32 0.64 1.28 2.56 5.12 TmeasureFDD[s](number ofDRX cycles) 0.64(8DRXcycles) 0.64(4) 1.28(4) 1.28(2) 1.28(1) 2.56(1) 5.12(1)

In this way, when the user terminal supports the MBMS service in the Idle, CELL_PCH or URA_PCH state and performs inter-frequency measurement, the user terminal needs to periodically perform inter-frequency measurement processing to obtain inter-frequency measurement values. A user terminal without dual receivers will also interrupt reception of the MBMS service of the current cell during inter-frequency measurement.

It can be seen from the above table that there is a multiple relationship between the cycle of the user terminal performing different frequency measurement to obtain the different frequency measurement value and the period of the MCCH information delivered by the UTRAN. ; Therefore, it may also cause the total sampling time of the user terminal to perform inter-frequency measurement and the delivery time of the MCCH information to overlap, thereby making the user terminal always unable to receive important and necessary MCCH information.

In the CELL_DCH state, the WCDMA FDD terminal performs inter-frequency measurement in the compressed mode indicated by UTRAN, and the technical principle of the compressed mode is shown in Figure 2, that is, UTRAN is sending certain frames (the data sent every 10ms is a frame ), increase the data transmission rate, and use less than 10ms to send the data that originally needs to be sent within 10ms. Then the time when the airspace comes out is used for the user terminal UE to perform inter-frequency measurement. What method and what time are used specifically? To increase the sending rate, it is completely controlled by UTRAN.

When a WCDMA FDD terminal is in the CELL_DCH state and receives MBMS PTM services, UTRAN controls the user terminal to perform inter-frequency measurement by issuing information bearing the compressed mode. When the user terminal supports receiving MBMS control information on MCCH, when the user terminal without dual receivers performs inter-frequency measurement, it will interrupt the reception of the MCCH information of the current cell; and the time for performing inter-frequency measurement is completely sent by UTRAN compression mode information to indicate.

However, when UTRAN constructs the compressed mode of user terminal inter-frequency measurement, the transmission period of MCCH information is not considered at all. Since the compressed mode information is repeatedly applied by the user terminal, and the MCCH information is also sent periodically, this will lead to compression. The inter-frequency measurement time indicated by the mode may overlap with the sending time of MCCH information, which will cause the user terminal to always fail to receive important and necessary MCCH information when performing inter-frequency measurement within the inter-frequency measurement time specified by UTRAN .

The problems existing in the inter-frequency measurement performed by the user terminal in various states above also exist in the inter-system measurement.

Contents of the invention

The technical problem to be solved by the present invention is to propose a method for measuring different frequency/different systems in the multimedia broadcast multicast service, so as to avoid the overlapping of the time sum of the different frequency/different system measurement time and the MCCH information issued by UTRAN, resulting in the user terminal in different Disadvantages of not being able to receive MCCH information during measurement of frequency/inter-frequency systems.

In order to solve the above problems, the technical scheme proposed by the present invention is as follows:

A method for measuring different frequencies/different systems in a multimedia broadcast multicast service, comprising steps:

The user terminal sets the inter-frequency/different-system measurement time that avoids total overlap with the MCCH information dispatch time according to the time when the UTRAN sends the MCCH information; or

UTRAN sets the inter-frequency/different-system measurement time that avoids total overlap with the MCCH information delivery time according to the time when it sends MCCH information, and assigns the set inter-frequency/different-system measurement time to the user terminal;

The user terminal performs the inter-frequency/different-system measurement processing at the inter-frequency/different-system measurement time set by itself or at the inter-frequency/different-system measurement time specified by the UTRAN.

The user terminal learns the time when the UTRAN delivers the MCCH information from the system information delivered by the UTRAN.

When the user terminal is in the CELL_FACH state, the user terminal sets the different frequency/different system measurement time. The specific process includes:

(a1) The user terminal triggers inter-frequency/different-system measurement processing, and calculates its own inter-frequency/different-system measurement time;

(a2) When the user terminal judges that the calculated inter-frequency/different-system measurement time sum overlaps with the MCCH information delivery time, the calculated inter-frequency/different-system measurement time offset is used as the set inter-frequency/different-system measurement time.

In the step (a1), the user terminal calculates its own inter-frequency/inter-system measurement time according to the following formula:

SFN＝(C_RNTI mod M_REP+n×M_REP)×N

Wherein, the user terminal performs inter-frequency/inter-system measurement in the frame SFN satisfying the above formula;

N is the transmission time interval of the forward access channel with the maximum transmission time interval divided by 10ms on the auxiliary common control physical channel of the logical channel carrying the non-MBM service logic channel monitored by the user terminal;

M_REP is the cycle period of the measurement interval, M_REP= ^2k , the repetition period of the measurement time of an N frame is N×M_REP frames; where k is the cycle coefficient of the measurement interval of the forward access channel, contained in the system information 11 or 12 Read from the forward access channel measurement time information;

C_RNTI is the wireless network temporary identification value of the user terminal;

n=0, 1, 2... as long as SFN is below its maximum value.

Wherein in the step (a2), the user terminal offsets the different-frequency/different-system measurement time by the user terminal. The offset value is randomly generated by the user terminal, and the offset value is the logic channel that carries the non-multimedia broadcast multicast service monitored by the user terminal. Integer multiples of the number of frames contained in the transmission time interval of the forward access channel with the largest transmission time interval.

Or in the step (a2), the user terminal offsets the different-frequency/different-system measurement time by the UTRAN and broadcasts it to the user terminal, and the offset value is the bearer non-multimedia broadcasting group monitored by the user terminal Integer multiples of the number of frames contained in the forward access channel transmission time interval with the largest transmission time interval of the broadcast service logic channel.

When the user terminal is in the CELL_FACH state, the different frequency/different system measurement time is set by the UTRAN; the UTRAN assigns the set different frequency/different system measurement time to the user terminal by broadcasting.

The duration of inter-frequency/different-system measurement performed by the user terminal at the inter-frequency/different-system measurement time specified by UTRAN is the forward access channel with the largest transmission time interval of the logical channel carrying non-multimedia broadcast multicast services monitored by the user terminal The transmission time interval, each measurement interval is N×M_REP, where M_REP is the measurement interval cycle period, M_REP=2 ^k , k is the forward access channel measurement interval cycle coefficient, in the forward access channel contained in the system information 11 or 12 Read from the access channel measurement time information.

When the user terminal is in the state of Idle, CELL_PCH or URA_PCH, the user terminal sets the different frequency/different system measurement time; the user terminal realizes the setting avoidance of the totality of the MCCH information delivery time by controlling and scheduling the different frequency/different system measurement sampling time Overlapped inter-frequency/inter-system measurement times.

When the WCDMA FDD user terminal is in the CELL_DCH state, the different frequency/different system measurement time is set by UTRAN; UTRAN constructs a compressed mode for instructing the user terminal to perform different frequency/different system measurement processing according to the set different frequency/different system measurement time, and Assign the constructed compressed mode to the user terminal; the user terminal performs inter-frequency/different-system measurement processing at the inter-frequency/different-system measurement time indicated by the compressed mode specified by UTRAN.

In the present invention, the user terminal sets the different-frequency/different-system measurement time which avoids total overlap with the MCCH information delivery time for different-frequency/different-system measurement processing by the user terminal according to the time of MCCH information delivery by UTRAN; The time setting of the MCCH information avoids the inter-frequency/different-system measurement time that always overlaps with the MCCH information delivery time, and assigns the set inter-frequency/different-system measurement time to the user terminal for inter-frequency/different-system measurement processing. In this way, the time for the user terminal to perform inter-frequency/different-system measurement processing is always overlapped with the time when UTRAN sends MCCH information, and the purpose of not delaying the reception of MCCH information when the user terminal performs inter-frequency/different-system measurement processing , which is conducive to the development of MBMS services.

Description of drawings

Figure 1 is a schematic diagram of the relationship between "repeat period", "modification period" and "access information period" during UTRAN sending MCCH information;

FIG. 2 is a schematic diagram of a technical principle of an existing compression mode;

Fig. 3 is a flow chart of one of the main realization principles of the present invention;

Fig. 4 is another main realization principle flowchart of the present invention;

Fig. 5 is when the user terminal is in the CELL_FACH state, the implementation process flow chart of setting the different frequency/different system measurement time by the user terminal;

Fig. 6 is when the user terminal is in the CELL_FACH state, the implementation process flow chart of setting the different frequency/different system measurement time by UTRAN;

FIG. 7 is a flow chart of the implementation process of setting the measurement time of different frequencies/systems by the user terminal when the user terminal is in the state of Idle, CELL_PCH or URA_PCH;

Figure 8 is a flow chart of the implementation process of setting the measurement time of different frequencies/systems by UTRAN when the WCDMA FDD user terminal is in the CELL_DCH state.

Detailed ways

The different-frequency/different-system measurement method in the MBMS of the present invention aims at that in the prior art, when the user terminal does not have dual receivers, its different-frequency/different-system measurement time always overlaps with the time when UTRAN sends MCCH information, causing the user terminal In the inter-frequency/inter-system measurement, the important and necessary MBMS messages are always not received, and it is proposed that when the user terminal does not have dual receivers, considering the different states of the user terminal, it is judged and controlled by the user terminal or by UTRAN Scheduling the user terminal to control the different frequency/different system measurement time, so that the user terminal can prevent the measurement time from always overlapping with the sending time of the MCCH information while performing the different frequency/different system measurement.

As shown in Figure 3, it is a flow chart of one of the main realization principles of the present invention, and its main realization principles are as follows:

Step S10, the user terminal UE sets the inter-frequency/different-system measurement time that avoids total overlap with the MCCH information dispatch time according to the time when the UTRAN sends the MCCH information;

In step S20, the UE performs inter-frequency/different-system measurement processing at the aforementioned inter-frequency/different-system measurement time set by itself.

The UE can know the time when UTRAN delivers MCCH information from the system information delivered by UTRAN, because the system information delivered by UTRAN includes scheduling information of MCCH information and inter-frequency/inter-system measurement information, and its scheduling information further includes The transmission time of MCCH information, the modification period during the delivery of MCCH information, the access information period, and the repetition period, etc.; and the inter-frequency/inter-system measurement information further includes various information that triggers inter-frequency/inter-system measurement.

As shown in Figure 4, it is another main realization principle flowchart of the present invention, and its main realization principle is as follows:

Step S100, the UTRAN sets the inter-frequency/different-system measurement time that avoids total overlap with the MCCH information dispatch time according to the time when the UTRAN sends the MCCH information;

Step S110, UTRAN assigns the inter-frequency/inter-system measurement time set above to UE;

In step S120, the UE performs inter-frequency/different-system measurement processing at the inter-frequency/different-system measurement time specified by the UTRAN.

When the user terminal is in the CELL_FACH state, the user terminal sets the different frequency/different system measurement time. The specific implementation process is shown in Figure 5. This process is used for the user terminal in the CELL_FACH state to support MBMS. Inter-frequency measurement processing, the main implementation process is:

Step S31, the UE acquires the time when the UTRAN sends the MCCH information from the system information sent by the UTRAN (the UTRAN will send the MCCH scheduling information to the UE, and the scheduling information includes the MCCH information transmission time, modification period, access information period, repeat cycle, etc.);

In step S32, the UE triggers inter-frequency/different-system measurement processing, and calculates its own inter-frequency/different-system measurement time, wherein its own inter-frequency/different-system measurement time is calculated according to the following formula:

SFN＝(C_RNTI mod M_REP+n×M_REP)×N

The user terminal performs inter-frequency/inter-system measurement in the frame SFN satisfying the above formula;

Where N is the transmission time interval TTI of the forward access channel FACH with the maximum transmission time interval TTI on the Secondary Common Control Physical Channel (SCCPCH, Secondary Common Control Physical Channel) monitored by the user terminal to carry the non-MBMS service logical channel divided by 10ms ;

M_REP is the cycle period of the measurement interval, M_REP= ^2k , the repetition period of the measurement time of an N frame is N×M_REP frame; where k is the cycle coefficient of the measurement interval of the forward access channel FACH, contained in the system information 11 or 12 Read from the forward access channel measurement occasion information "FACH measurementoccasion info";

C_RNTI is the radio network temporary identification value of the user terminal UE;

n=0, 1, 2... as long as SFN is below its maximum value.

Step S33, after the UE has calculated its own inter-frequency/different-system measurement time, compare whether its own inter-frequency/different-system measurement time overlaps with the time when UTRAN sends MCCH information, if yes, execute step S34; otherwise, execute step S35 ;

In step 34, the UE offsets the inter-frequency/different-system measurement time calculated above to obtain a new inter-frequency/different-system measurement time; here, it is assumed that the offset time value is measurement offset. The offset time value measurement offset can be randomly generated by the user terminal UE, and the offset time value measurement offset is the maximum forward access of the transmission time interval TTI of the logical channel carrying non-MBMS services monitored by the UE in the CELL_FACH state The transmission time interval TTI of the channel FACH is an integer multiple of the number of frames contained in it, and it is ensured that the new inter-frequency/inter-system measurement time does not always overlap with the delivery time of the MCCH information.

In addition, the offset time value measurement offset can also be generated by UTRAN and broadcast to the user terminal, and the offset time value measurement offset is the transmission time interval TTI of the logical channel carrying non-MBMS services monitored by the user terminal in the CELL_FACH state The maximum forward access channel FACH transmission time interval TTI is an integral multiple of the number of frames contained in it, and ensures that the new inter-frequency/inter-system measurement time does not always overlap with the delivery time of MCCH information. The inter-frequency/inter-system measurement time after offset processing should meet the requirements of the following formula:

SFN＝(C_RNTI mod M_REP+n*M_REP)*N+Measurement Offset.

In step S35, the user terminal UE receives the MCCH information at the time when the UTRAN sends the MCCH information, and performs inter-frequency/different-system measurement processing at the inter-frequency/different-system measurement time.

In addition, when the user terminal is in the CELL_FACH state, the inter-frequency/different-system measurement time can also be set by UTRAN. The specific implementation process is shown in Figure 6. This process is used for the user terminal in the CELL_FACH state to support MBMS The different frequency measurement processing of , its main implementation process is:

Step S41, the UE receives the system information sent by the UTRAN, and obtains the time when the UTRAN sends the MCCH information from the system information (the UTRAN will send the MCCH scheduling information to the UE, and the scheduling information includes the MCCH information transmission time, modification period, reception input information cycle, repeat cycle, etc.);

Step S42, the UTRAN sets the inter-frequency/different-system measurement time to avoid overlapping with the MCCH information delivery time according to the time when the UTRAN sends the MCCH information, and sends the set inter-frequency/different-system measurement time to the UE by broadcasting;

Step S43, the UE triggers inter-frequency/inter-system measurement processing;

Step S44, UE performs inter-frequency/different-system measurement processing at the inter-frequency/different-system measurement time specified by UTRAN, and performs inter-frequency/different-system measurement every N×M_REP frame, and the duration of each measurement is equal to that monitored by the user terminal The TTI of the FACH that bears the largest TTI of the non-MBMS logical channel; and receive the MCCH information at the time when the UTRAN sends the MCCH information.

When the user terminal is in the Idle, CELL_PCH or URA_PCH state, the user terminal sets the different frequency/different system measurement time. The specific implementation process is shown in Figure 7. This process is used for the Idle, CELL_PCH or URA_PCH state. The main implementation process of the inter-frequency measurement processing when the user terminal supports MBMS is as follows:

Step S51, the UE receives the system information sent by the UTRAN, and obtains the time when the UTRAN sends the MCCH information from the system information;

Step S52, the UE triggers inter-frequency/inter-system measurement processing;

Step S53, the UE controls and schedules its own inter-frequency/different-system measurement sampling time according to the time when the UTRAN sends the MCCH information, so that its own inter-frequency/different-system measurement time does not always overlap with the delivery time of the MCCH information;

In step S54, the UE performs inter-frequency/different-system measurement processing at the inter-frequency/different-system measurement time, and receives MCCH information at the time when the MCCH information is issued.

Among them, when the WCDMA FDD user terminal is in the CELL_DCH state, the inter-frequency/different-system measurement time is set by UTRAN. The specific implementation process is shown in Figure 8. This process is used for the WCDMA FDD user terminal in the CELL_DCH state to support MBMS Under the circumstances and supports inter-frequency measurement processing when receiving MBMS control information on MCCH, the main implementation process is as follows:

Step S61, the UE receives the system information issued by the UTRAN, and obtains the time when the UTRAN issues the MCCH information from the system information;

Step S62, UTRAN sets the inter-frequency/different-system measurement time according to the time when it sends the MCCH information to avoid overlapping with the MCCH information delivery time, and constructs the inter-frequency/different-system measurement time according to the set inter-frequency/different-system measurement time to instruct the user terminal to perform different The compressed mode of frequency/different system measurement processing, that is, the compressed mode is constructed by UTRAN considering the delivery time of MCCH information, so as to ensure that the measurement time of different frequency/different system indicated by the compressed mode does not always overlap with the delivery time of MCCH information;

Step S63, UTRAN assigns the above-mentioned compressed mode to the user terminal;

In step S64, the user terminal performs inter-frequency/different-system measurement processing at the inter-frequency/different-system measurement time indicated by the compressed mode specified by the UTRAN, and receives MCCH information at the time when the MCCH information is issued.

By summarizing the various processing procedures, the disadvantage that user terminals in different states cannot always receive important and necessary MBMS messages due to different frequency/different system measurement processing can be avoided.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (10)

1, a kind of different frequency/different system measurement method in the multimedia broadcast multicast service, it is characterized in that, comprises steps: The user terminal sets the inter-frequency/different-system measurement time that avoids total overlap with the MCCH information dispatch time according to the time when the UTRAN sends the MCCH information; or UTRAN sets the inter-frequency/different-system measurement time that avoids total overlap with the MCCH information delivery time according to the time when it sends MCCH information, and assigns the set inter-frequency/different-system measurement time to the user terminal; The user terminal performs the inter-frequency/different-system measurement processing at the inter-frequency/different-system measurement time set by itself or at the inter-frequency/different-system measurement time specified by the UTRAN. 2. The inter-frequency/inter-system measurement method in the multimedia broadcast multicast service according to claim 1, characterized in that the user terminal knows the time when the MCCH information is issued by the UTRAN from the system information issued by the UTRAN. 3. The method for measuring different frequencies/different systems in the multimedia broadcast multicast service according to claim 1 or 2, wherein the user terminal is in the CELL_FACH state, and the user terminal sets the different frequency/different system measurement time, specifically The process includes: (a1) The user terminal triggers inter-frequency/different-system measurement processing, and calculates its own inter-frequency/different-system measurement time; (a2) When the user terminal judges that the calculated inter-frequency/different-system measurement time sum overlaps with the MCCH information delivery time, the calculated inter-frequency/different-system measurement time offset is used as the set inter-frequency/different-system measurement time. 4. The method for measuring different frequency/different systems in the multimedia broadcast multicast service as claimed in claim 3, wherein in the step (a1), the user terminal calculates its own different frequency/different system measurement time according to the following formula : SFN＝(C_RNTI mod M_REP+n×M_REP)×N Wherein, the user terminal performs inter-frequency/inter-system measurement in the frame SFN satisfying the above formula; N is the transmission time interval of the forward access channel with the maximum transmission time interval divided by 10ms on the auxiliary common control physical channel of the logical channel carrying the non-MBM service logic channel monitored by the user terminal; M_REP is the cycle period of the measurement interval, M_REP= ^2k , the repetition period of the measurement time of an N frame is N×M_REP frames; where k is the cycle coefficient of the measurement interval of the forward access channel, contained in the system information 11 or 12 Read from the forward access channel measurement time information; C_RNTI is the wireless network temporary identification value of the user terminal; n=0, 1, 2... as long as SFN is below its maximum value. 5. The method for measuring different frequency/different systems in the multimedia broadcast multicast service according to claim 3, characterized in that, in the step (a2), the user terminal offsets the different frequency/different system measurement time The offset value is randomly generated by the user terminal, and the offset value is an integer multiple of the number of frames contained in the transmission time interval of the forward access channel with the largest transmission time interval of the logical channel carrying non-multimedia broadcast multicast services monitored by the user terminal . 6. The method for measuring different frequency/different systems in the multimedia broadcast multicast service according to claim 3, characterized in that, in the step (a2), the user terminal offsets the different frequency/different system measurement time The offset value is generated by UTRAN and sent to the user terminal by broadcast. The offset value is the frame contained in the transmission time interval of the forward access channel with the largest transmission time interval of the logic channel carrying non-multimedia broadcast multicast service monitored by the user terminal. Integer multiples of a number. 7. The method for measuring different frequencies/different systems in the multimedia broadcast multicast service according to claim 1 or 2, characterized in that, When the user terminal is in the CELL_FACH state, the measurement time of different frequency/system is set by UTRAN; The UTRAN assigns the set inter-frequency/inter-system measurement time to the user terminal by broadcasting. 8. The inter-frequency/different-system measurement method in the multimedia broadcast multicast service according to claim 7, characterized in that, the user terminal performs inter-frequency/different-system measurement at the inter-frequency/different-system measurement time specified by UTRAN The time is the transmission time interval of the forward access channel with the largest transmission time interval of the logical channel carrying non-multimedia broadcast multicast services monitored by the user terminal, and each measurement interval is N×M_REP, where M_REP is the measurement interval cycle period, M_REP= 2 ^k , k is the forward access channel measurement interval cycle coefficient, which is read from the forward access channel measurement time information included in the system information 11 or 12 . 9. The method for measuring different frequencies/different systems in the multimedia broadcast multicast service according to claim 1 or 2, characterized in that, When the user terminal is in the Idle, CELL_PCH or URA_PCH state, the user terminal sets the different frequency/different system measurement time; The user terminal realizes setting the inter-frequency/different-system measurement time which avoids total overlap with the MCCH information sending time by controlling and scheduling the inter-frequency/different-system measurement sampling time. 10. The inter-frequency/inter-system measurement method in the multimedia broadcast multicast service according to claim 1 or 2, characterized in that, When the WCDMA FDD user terminal is in the CELL_DCH state, the measurement time of different frequency/system is set by UTRAN; UTRAN constructs a compressed mode for instructing the user terminal to perform different frequency/different system measurement processing according to the set different frequency/different system measurement time, and assigns the constructed compressed mode to the user terminal; The user terminal performs inter-frequency/different-system measurement processing at the inter-frequency/different-system measurement time indicated by the compressed mode specified by the UTRAN.

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